krb5_string_to_key
ret = krb5_string_to_key(context, enctype, opt->password_string,
ret = krb5_string_to_key (context, enctype, "foo", server, &key);
ret = krb5_string_to_key(context->context,
krb5_string_to_key (
ret = krb5_string_to_key (context, t->enctype, t->password,